function mostrarTabla1(){
var ancla = document.getElementById("submit-button");	
var tabla1 = document.getElementById("tabla1");
var tabla2 = document.getElementById("tabla2");
var tabla3 = document.getElementById("tabla3");
mostrado=0;

if(tabla1.style.display=='block')
	{
	mostrado=1;
	tabla1.style.display='none';
	tabla2.style.display='none';
	tabla3.style.display='none';	
	}

if(mostrado!=1)
	{
	tabla1.style.display='block';
	tabla2.style.display='none';
	tabla3.style.display='none';		
	ancla.focus();
	}

}

function mostrarTabla2(){
var ancla = document.getElementById("submit-button");	
var tabla1 = document.getElementById("tabla1");
var tabla2 = document.getElementById("tabla2");
var tabla3 = document.getElementById("tabla3");
mostrado=0;

if(tabla2.style.display=='block')
	{
	mostrado=1;
	tabla1.style.display='none';
	tabla2.style.display='none';
	tabla3.style.display='none';	
	}

if(mostrado!=1)
	{
	tabla1.style.display='none';
	tabla2.style.display='block';
	tabla3.style.display='none';		
	ancla.focus();
	}

}

function mostrarTabla3(){
var ancla = document.getElementById("submit-button");	
var tabla1 = document.getElementById("tabla1");
var tabla2 = document.getElementById("tabla2");
var tabla3 = document.getElementById("tabla3");
mostrado=0;

if(tabla3.style.display=='block')
	{
	mostrado=1;
	tabla1.style.display='none';
	tabla2.style.display='none';
	tabla3.style.display='none';	
	}

if(mostrado!=1)
	{
	tabla1.style.display='none';
	tabla2.style.display='none';
	tabla3.style.display='block';		
	ancla.focus();
	}

}